Question

A tree grows 20 percent taller every year after it is planted. The tree was 12 feet tall when planted. How tall will it be after 10 years? 74.3 feet 120 feet 144 feet 146.3 feet

Answer 1

74.3 feet

Explanation:

Each year, the height is multiplied by 1 +20% = 1.20. After 10 years, the original height is multiplied by 1.20^10, so is ...

(12 ft)1.20^10 ≈ (12 ft)(6.19174) ≈ 74.3 ft